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Figure 57 Picture

Figure 57

Figure 57. Puhler sounder, described by Christian Puhler in 1563, repeated an idea first put forth by Cardinal Nicholas Pusanus a century earlier. The principle, was to attach a float to a weight making it heavier than water. Upon striking bottom, the float would detach. Depth would be derived from round- trip travel time. It is unknown if this device was ever field tested.

Photo Category: Oceanography - Historical instruments

Author: Y. Berard/Oceanographic Museum of Monaco/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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18th October 2015
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